Question

There are 45 boats in the pier. 1/4 of the boats have WIFI from Blue WIFI Co. 3/8 of the boats use the Yellow WIFI company. The remaining boats do not use WIFI. How many boats do not use WIFI?

a) 11
b) 15
c) 18
d) 21

Answer 1

To find out how many boats do not use WIFI, we calculated 1/4 of the boats using Blue WIFI Co. to be 11 boats, and 3/8 of the boats using Yellow WIFI Company to be 16 boats. After totaling the two groups, we subtracted from the overall number of boats (45), which resulted in 18 boats not using WIFI.

Step-by-step explanation:

To determine how many boats do not use WIFI, we need to calculate the number of boats that use each WIFI company and then subtract that total from the total number of boats.

First, calculate the number of boats that have WIFI from Blue WIFI Co.:

• 1/4 of the boats = 45 boats * (1/4) = 11.25, since we can't have a fraction of a boat, we round down to 11 boats with Blue WIFI Co.

Now, calculate the number of boats that use the Yellow WIFI company:

• 3/8 of the boats = 45 boats * (3/8) = 16.875, which is also rounded down to 16 boats with Yellow WIFI.

Next, we add the number of boats with Blue WIFI and Yellow WIFI to find the total number of boats with WIFI:

11 boats (Blue WIFI) + 16 boats (Yellow WIFI) = 27 boats with WIFI.

Finally, subtract the number of boats with WIFI from the total number of boats to find out how many do not use WIFI:

45 boats (total) - 27 boats (with WIFI) = 18 boats do not use WIFI.

Therefore, the correct answer is c) 18.